IDEAL Electrical Standard Drill/Tap Bits are designed to deliver heavy-duty, hole-drilling across the toughest materials in a quick time. Manufactured using high-speed steel, the tap bits resist abrasion and corrosion. The SmoothStart tip minimizes thread damage and increases the life of the bit. The 3-flute design offers fast chip removal and minimized binding. The deburring cutting edge offers clean drilling and prevents over drilling. The precision drill bits work well with both corded and cordless drills and can drill through 10 gauge mild steel, aluminum, copper, brass and plastic. Bit sizes include 6-32(1), 8-32(2), 10-24(1), 10-32(1), 12-24(1), and 1/4-20(2).